I was designing a power supply from 60HZ using faraday's current law. I have used a coil which will give me 100A at primary 1V at secondary. It can go upto 25KA and down to 50A. I want to limit the voltage at secondary at 25V.
At 25KA the secondary will be 200V. This fault current can stay up to 200mS. How can I limit this voltage at 25V across the coil.

I thought of using a MOV or TVS. But the MOV it is rated for 8/20Us and TVS 10/1000us. I don't think TVS/MOV can dissipate 200V to 25V for 200ms. Whether am I correct?

Can please anyone suggest a component that can do this purpose? Please help. Thanks.

Let me be crystal clear. The coil had better be part of a transformer or the mods will close this thread. A coil all by it self is NOT a transformer. You use the words "primary" and "secondary" but the circuit you are describing is ambiguous. Post a schematic of what you are doing -- that should resolve the ambiguity.

Let me be crystal clear. The coil had better be part of a transformer or the mods will close this thread. A coil all by it self is NOT a transformer. You use the words "primary" and "secondary" but the circuit you are describing is ambiguous. Post a schematic of what you are doing -- that should resolve the ambiguity.

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It could also be some language problems involved here. But I have to say the specs raised my eyebrow a tad. Anyway a schematic is the ultimate tool for overcoming language problems in electronics